Content Preview: rss
200 days ago
+ : plus(positive正的) －：minus（negative负的） *：multiplied by ÷：divided by ＝: be equal to ≈ : be approximately equal to () : round brackets(parenthess) [] : square brackets {} : braces ∵ : because ∴ : therefore ≤ : less than or equal to ≥ ：greater than or equal to ∞：infinity f(x) : the function of x dx : diffrencial of x x+y : x plus y (a+b) : bracket a plus b bracket closed a=b : a equals b a≠b ：a isn't equal to b a>b : a is greater than b a>>b : a is much greater than b a≥b : a is greater than or equal to b x→∞ ：x approches infinity ＜ is less than ＞ is more than ≮ is not less than ≯ is not more than ≤ is less than or equal to 小于或等于号 - hyphen 连字符 ≥ is more than or equal to 大于或等于号 ' apostrophe 省略号,英文中省略字符用的撇号;所有格符号 ％ percent － dash 破折号 ‰ per mille ∞ infinity 无限大号 ∝ varies as 与…成比例 ( ) parentheses 圆括号 √ (square) root 平方根 [ ] square brackets 方括号 ∵ since; because 因为 《 》 French quotes 法文引号;书名号 ∴ hence 所以 … ellipsis 省略号 ...
221 days ago
二分法 : function root=MultiRoot(f,a,b,eps) if(nargin==3) eps=1.0e-4; end f1=subs(sym(f),findsym(sym(f)),a); f2=subs(sym(f),findsym(sym(f)),b); if(f1==0) root=a; end if(f2==0) root=b; end if(f1*f2>0) disp(' 两端点函数值乘积大于0!'); return; else tol=1; fun=diff(sym(f)); ddf=diff(sym(fun)); fa=subs(sym(f),findsym(sym(f)),a); fb=subs(sym(f),findsym(sym(f)),b); dfa=subs(sym(fun),findsym(sym(fun)),a); dfb=subs(sym(fun),findsym(sym(fun)),b); if(dfa>dfb) root=a; else root=b; end while(tol>eps) r1=root; fx=subs(sym(f),findsym(sym(f)),r1); dfx=subs(sym(fun),findsym(sym(fun)),r1); ddfx=subs(sym(ddf),findsym(sym(ddf)),r1); root=r1-fx*dfx/(dfx*dfx-fx*ddfx); tol=abs(root-r1); end end Example: >> ...
228 days ago
当一个动态的协同节点上有某存储的消息与查询消息匹配时，生成的响应消息要在传统意义上原路返回几乎不可能，所以可以采取基于梯度场的机制。梯度值的如何计算是一个问题（跳数、延迟应该是主要考虑因素）。此外，有多个查询消息匹配同一个目标消息时，如何优化传输？若一个查询得到多个响应，如何过滤？整个过程的模型如何建立呢？ 先找全所有变量再说吧！HOHOHOOH。。
275 days ago
The leaving day is coming. Living together in past nearly three weeks made us be taken more with both sides. We did all what we could do. I cann't forget those pictures representing your smile,worry,animation,lose...which will be stored in my mind forever. You said you would wait for me. You said you grown up. You said you loved me. You said you expected to marry me. Yup,you trust me and gave a so great wish to me. Well. Well. It's a circinal credible chain, isn't it? Thus. There's no doubt I will also abide by my promise with no any hesitancy. In other words, you inspired me and upgraded my confidence. Please remember the ideality I've told you ever before. The style of that life is what I'm most willing to strive for my whole life and, from now on hand in hand with you. I believe confirmedly, the leaving is a beginning of the next meeting. I'm waiting...
